Normalizing
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Normalizing is the process in which a part is heated above its critical temperature, held, and then air cooled to form a more homogenous structure and refine the grain size.
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Industries
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Related Processes
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Common Alloys
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TMT Equipment/Variations
Normalizing can be performed in an endothermic or air atmosphere. An endothermic process will reduce the amount of scaling, but some scaling will remain present due to the air cool. Induction heating can be used to limit normalization to certain areas of a part. |
Applications
- Normalizing is often performed after forging or casting to eliminate forming stresses, reduce segregation, and refine the grain size. This improves mechanical properties in subsequent heat treating operations
- Normalizing is used in situations where strength levels obtained by quench and tempering are not necessary, but superior strength to the annealed or as rolled condition is needed
- Normalizing can improve dimensional stability in subsequent machining operations
Associated Specs/Standards
- AMS 2759/1, AMS-H-6875
- ASTM A106, A350, A668
What To Consider When Specifying
- Material
- Processing Atmosphere
- Hardness range (if required)
- Spec (if required)
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